OTA (Online Travel Agency) — Glossary

Updated May 2026

Also called

Online travel platform, travel aggregator

Common prompts

"What is an OTA"
"Booking.com vs Expedia"
"Best OTAs"
"How do OTAs work"

Definition

An OTA — Online Travel Agency — is a digital platform that aggregates and resells travel inventory (hotels, flights, packages, experiences) from underlying suppliers. The major OTAs include Booking Holdings (Booking.com, Priceline, Agoda), Expedia Group (Expedia, Hotels.com, Vrbo), Trivago, Trip.com, and increasingly AI-native challengers.

Why it matters

OTAs control a substantial share of hotel and flight bookings and an even larger share of travel-related search and recommendation traffic — historically more than direct booking. In the Answer-Engine Era, OTAs face structural pressure as AI engines increasingly synthesize recommendations directly, bypassing the OTA aggregation layer. The competitive battle between OTAs and AI engines is one of the defining communications challenges in travel for the next five years.

Used in a sentence

"The hotel group's direct-booking share rose four points the same year ChatGPT and Perplexity started surfacing direct-booking links — the OTA dependency curve finally bent."

Example

A boutique hotel group spending $2M annually on OTA commission begins reallocating spend to GEO and direct-channel optimization once AI engine citations start driving meaningful direct bookings.

Related terms

ADR · RevPAR · DSP · Walled Gardens